A search for neutral heavy leptons
نویسندگان
چکیده
منابع مشابه
A Search for Neutral Heavy Leptons
In e+eannihilations at SPEAR we have searched for narrow neutral resonances in the eT and ~.ln channels for masses between .5 GeV/c 2 and 1.5 GeV/c2. No evidence for such states has been found. Under standard theoretical assumptions for production cross sections and decay branching ratios of heavy leptons a lower limit of 1.2 GeV/c 2 can be set on the mass. *FJork supported by the Energy Resear...
متن کاملSearch for new Heavy Leptons
A review is given on the search for new heavy leptons in e+eand pj!i collisions. Invited talk at the XXl’Vth International Conference on High Energy Physics, Munich, Germany, August 4-10, 1988 1 5‘ * Wo;k’kpported by the Department of Energy, contract DE-AC03-76SF00515. tM&iling address: DESY F36, Notkestrafie 85, D 2000 Hamburg 52. Bitnet address: user F36WDB at node DHHDESYS. Search for new H...
متن کاملSearch for Neutral Heavy Leptons in a High-Energy Neutrino Beam
A search for neutral heavy leptons (NHLs) has been performed using an instrumented decay channel at the NuTeV (E-815) experiment at Fermilab. The data were examined for NHLs decaying into muonic nal states (, ee, , and); no evidence has been found for NHLs in the 0.25-2.0 GeV mass range. This analysis places limits on the mixing of NHLs with standard light neutrinos at a level up to an order of...
متن کاملOn Neutrino Production of Heavy Neutral Leptons*
Production of heavy neutral leptons by p -.type neutrinos is inves tigated in the framework of a strangeness-conserving neutral current model, ati the analysis is applied to the Ramm effect. The failure to observe such heavy leptons in the K-meson decay spectrum is easily understood, but the large charged current coupling strength required in the heavy lepton decay (well above the universal val...
متن کاملNeutral Heavy Leptons and Electroweak Baryogenesis
We investigate the possibility that baryogenesis occurs during the weak phase transition in a minimal extension of the Standard Model which contains extra neutral leptons and conserves total lepton number. The necessary CP-violating phases appear in the leptonic Yukawa couplings. We compute the CP-asymmetries in both the neutral and the charged lepton fluxes reflected in the unbroken phase. Usi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1977
ISSN: 0370-2693
DOI: 10.1016/0370-2693(77)90416-6